Tuesday Orange, Bronze - Colorchallenge / Smoky quartz from Switzerland

in ColorChallenge2 years ago (edited)

Hello dear colour friends

Today I would like to present you a beautiful piece Rauchquarz . I did not find these great pieces myself. I hope you like them. This is smoky quartz from Switzerland.
fluorit_mit_rauchquarz_aus_der_schweiz.jpg
(http://www.awminerals.com/pages/contact)

Smoky quartz (or morion) is a variety of the mineral quartz that has been coloured grey-brown (smoky) to black (morion) by natural or artificial gamma rays. Mostly brown smoky quartz is transparent to translucent. Well-formed smoky quartz crystals are rarer than comparable rock crystals, but still relatively common.

Fluorite, also known under the mining name fluorspar or its chemical name calcium fluoride, is the calcium salt of hydrofluoric acid and a very common mineral from the mineral class of simple halides. Fluorite crystallises in the cubic crystal system with the chemical composition CaF2 and develops cubic crystals with predominantly cubic or rarely octahedral crystal form as well as interpenetrating twins, but also granular, massive aggregates.
Pure fluorite is colourless and transparent, also grey due to impurities. However, it can take on almost all colours through foreign admixtures, mostly in weak intensity. Green, violet to black-violet and yellow crystals ("honey spar") are common, but blue, red and brown fluorites are also found. Likewise, a zonal colour change can often be observed. The line colour, on the other hand, is always white.
(The quote is from Wikipedia)

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